CVE-2025-15645
Ledger Nano X, Flex, Stax MCU Firmware Update Denial of Service
CVSS Score
4.6
EPSS Score
0.0%
EPSS Percentile
5th
Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.
| CWE | CWE-1284 |
| Vendor | ledger |
| Product | ledger nano x |
| Published | May 19, 2026 |
| Last Updated | May 20, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Ledger / Ledger Nano X
0 < 2.4.2
Ledger / Ledger Flex
0 < 1.2.2
Ledger / Ledger Stax
0 < 1.6.2
References
Credits
Guanxing Wen VulnCheck